intervenient

[in-ter-veen-yuh nt]
noun
  1. a person who intervenes.

Origin of intervenient

1595–1605; < Latin intervenient- (stem of interveniēns) coming between, present participle of intervenīre. See intervene, -ent
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018